Sid and Keri at Little Giant are super fine folks. I have a 25 they rebuilt, a brand new 100 they built and a 100 that I rebuilt. Been using the 25 for over 10 years and it's still like new, so don't worry about wearing one out. Sid will school ya on lube and maintenance. Can't really help on which to get, I love my 25 but have not run a 50 too much. The 25 should do ya fine, but the 50 will have a little more thump. Good luck!